This is a vintage Battersea pewter button with a raised quarter moon face and star. This button is in the book "The Button Book " About Buttons: A Collector's Guide by Peggy Ann Osbourne page 242. She says that Battersea produced this type of pewter button from the late 1970's.
It is signed & dated 1976 (in the photo it looks like 1978 but it's 1976 (with a loupe). It measures 5/8 " and has a metal shank.
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